Fan comprising nano-bearing

ABSTRACT

A fan including: a fan frame, a casing, fan blades, a magnetic piece, silicon steel sheets, a coil, a circuit board, a nano-bearing, and a rotational shaft of a motor. The fan frame is disposed at a bottom of the fan. The casing is disposed above the fan frame. The fan blades encircle the casing and are staggered with respect to one another. The magnetic piece is in a ring shape and is attached to an inner wall of the casing. The silicon steel sheets are stacked together, and disposed in a circle inside the magnetic piece. The coil is wound on the silicon steel sheets. The nano-bearing is disposed in a center of the silicon steel sheets. The rotational shaft of the motor is disposed inside the nano-bearing. The circuit board is connected to the coil wound on the silicon steel sheets.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of International Patent Application No. PCT/CN2013/000258 with an international filing date of Mar. 11, 2013, designating the United States, now pending, and further claims priority benefits to Chinese Patent Application No. 201210071619.2 filed Mar. 16, 2012. The contents of all of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference. Inquiries from the public to applicants or assignees concerning this document or the related applications should be directed to: Matthias Scholl P.C., Attn.: Dr. Matthias Scholl Esq., 245 First Street, 18th Floor, Cambridge, Mass. 02142.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a fan comprising a nano-bearing.

2. Description of the Related Art

Conventional bearings are made of steel or ceramic materials. Steel bearing is susceptible to oxidation corrosion, high temperature, and abrasion. Ceramic bearing has poor shock resistance, bad tenacity, and low bearing capacity.

In general, high speed fans employ ball bearing, and low speed fans employ low cost oil-impregnated bearing. Ball bearing has stable operation but it is expensive. Oil-impregnated bearing, for example, sleeve bearing, employs lubricating oil as a lubricant and drag reduction agent, which is cheap and produce little noise in its early use. However, the abrasion of the sleeve bearing is huge, which seriously shortens the service life of the bearing. In addition, with the volatilization of the lubricating oil, dust and impurities enters the bearing, thereby slowing down the rotary speed of the fan and increasing the noise. Furthermore, the serious abrasion of the bearing leads to the violent vibration of the fan.

SUMMARY OF THE INVENTION

In view of the above-described problems, it is one objective of the invention to provide a fan comprising a nano-bearing. The fan has high bearing capacity, high temperature resistance, wear resistance, and long service life.

To achieve the above objective, in accordance with one embodiment of the invention, there is provided a fan comprising a nano-bearing, the fan comprising: a fan frame, a casing, fan blades, a magnetic piece, silicon steel sheets, a coil, a circuit board, a nano-bearing, and a rotational shaft of a motor. The fan frame is disposed at a bottom of the fan. The casing is disposed above the fan frame. A plurality of the fan blades encircles the casing and the fan blades are staggered with respect to one another. The magnetic piece is in a ring shape and is attached to an inner wall of the casing. A plurality of the silicon steel sheets is stacked together, and disposed in a circle inside the magnetic piece. The coil is wound on the silicon steel sheets. The nano-bearing is disposed in a center of the silicon steel sheets. The rotational shaft of the motor is disposed inside the nano-bearing. The circuit board is connected to the coil wound on the silicon steel sheets.

In a class of this embodiment, the nano-bearing comprises an outer ring and an inner ring. The inner ring comprises an upper ring-shaped structure, a lower ring-shaped structure, and an accommodating chamber. The upper ring-shaped structure and the lower ring-shaped structure are discontinuously arranged. The accommodating chamber is disposed in a middle part of the inner ring between the upper ring-shaped structure and the lower ring-shaped structure. An oil storing cotton is disposed inside the accommodating chamber. The outer ring and the inner ring are made of nano-materials.

In a class of this embodiment, the nano-bearing is made of a nano-ceramic material, a nano-silicon carbide material, a nano-zirconia material, or a nano-silicon nitride.

In a class of this embodiment, nano-wear resistant layers are attached to an inner wall of the outer ring and/or an outer wall of the inner ring.

In a class of this embodiment, the nano-wear resistant layers are nano-ceramic coating layers.

In a class of this embodiment, one end of the rotational shaft of the motor is provided with a fixing clasp.

In a class of this embodiment, an oil leak-proof ring is disposed above the nano-bearing, and a sealant is disposed in the oil leak-proof ring.

In a class of this embodiment, an oil leak-proof lid is disposed at an opening of the outer ring at a lower part of the nano-bearing.

Advantages according to embodiments of the invention are summarized as follows:

Silicon steel sheet is a ferrosilicon soft magnetic alloy generally having a silicon content of between 0.5 and 4.5 wt. % and formed by hot and cold rolling. The addition of silicon is capable of improving the resistivity and the maximum permeability of iron, decreasing the coercivity, the core loss, and the magnetic aging. The silicon steel sheet is mainly used to manufacture cores of different kinds of transformers, motors, and generators, which include a high silicon type and a low silicon type according to the silicon content.

The fan of the invention utilizes the bearing manufactured by completely integration of nanoscale polymer materials and special additives. Crystal particles reach a nanoscale (10⁻⁹ m) and are firm, smooth, wear-resistant, and less volatile, thereby prolonging the service life of the fan.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described hereinbelow with reference to the accompanying drawings, in which:

FIG. 1 is a cross sectional view of a nano-bearing of a fan in accordance with one embodiment of the invention; and

FIG. 2 is a cross section view of a fan comprising a nano-bearing in accordance with one embodiment of the invention.

10. Inner ring; 11. Outer ring; 100. Accommodating chamber; 12. Rotational shaft; 120. Fixing clasp; 13. Oil storing cotton; 14. Oil leak-proof ring; 20. Casing; 21. Fan blade; 22. Fan frame; 30. Magnetic piece; 31. Circuit board; 32. Silicon steel sheets; and 40. Oil leak-proof lid.

DETAILED DESCRIPTION OF THE EMBODIMENTS

For further illustrating the invention, experiments detailing a fan comprising a nano-bearing are described below. It should be noted that the following examples are intended to describe and not to limit the invention.

As shown in FIG. 1, a fan is equipped with a bearing made of nano-materials. The nano-bearing comprises an outer ring 11 and an inner ring 10. The inner ring 10 comprises an upper ring-shaped structure, a lower ring-shaped structure, and an accommodating chamber 100. The upper ring-shaped structure and the lower ring-shaped structure are discontinuously arranged. The accommodating chamber 100 is disposed in a middle part of the inner ring 10 between the upper ring-shaped structure and the lower ring-shaped structure. An oil storing cotton is disposed inside the accommodating chamber 100. A rotational shaft 12 is disposed inside the inner ring 10. The outer ring and the inner ring are made of nano-materials.

As shown in FIG. 2, the fan equipped with the nano-bearing comprises a fan frame 22 disposed at a bottom of the fan. A casing 20 is disposed above the fan frame 22. A plurality of the fan blades 21 encircles the casing 20 and the fan blades are staggered with respect to one another. A ring-shaped magnetic piece 30 is attached to an inner wall of the casing 20. A plurality of the silicon steel sheets 32 is stacked together, and disposed in a circle inside the magnetic piece 30. The coil is wound on the silicon steel sheets. The nano-bearing, a structure of which is shown in FIG. 1, is disposed in a center of the silicon steel sheets 32. The rotational shaft 12 of a motor is disposed inside the nano-bearing. The circuit board 31 is connected to the coil wound on the silicon steel sheets 32. An oil leak-proof ring 14 is disposed above the nano-bearing, and a sealant is disposed in the oil leak-proof ring for preventing a lubricant from evaporating. Furthermore, an end of the rotational shaft 12 of the motor is provided with a fixing clasp 120. An oil leak-proof lid 40 is disposed at an opening of the outer ring at a lower part of the nano-bearing for further preventing the lubricant from leaking.

The nano-bearing is made of a nano-ceramic material, a nano-silicon carbide material, a nano-zirconia material, or a nano-silicon nitride. Or, nano-wear resistant layers are attached to an inner wall of the outer ring and/or an outer wall of the inner ring.

The bearing of the fan of the invention is made of the nano-material and is therefore high temperature resistant and wear resistant, thereby prolonging the service life of the fan.

While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention. 

The invention claimed is:
 1. A fan, comprising: a) a fan frame; b) a casing; c) fan blades; d) a magnetic piece; e) silicon steel sheets; f) a coil; g) a circuit board; h) a nano-bearing; and i) a rotational shaft driven by a motor; wherein the fan frame is disposed at a bottom of the fan; the casing is disposed above the fan frame; a plurality of the fan blades encircles the casing and the fan blades are staggered with respect to one another; the magnetic piece is in a ring shape and is attached to an inner wall of the casing; a plurality of the silicon steel sheets is stacked together, and disposed in a circle inside the magnetic piece; the coil is wound on the silicon steel sheets; the nano-bearing is disposed in a center of the silicon steel sheets; the rotational shaft of the motor is disposed inside the nano-bearing; and the circuit board is connected to the coil wound on the silicon steel sheets.
 2. The fan of claim 1, wherein the nano-bearing comprises an outer ring and an inner ring; the inner ring comprises: an upper ring-shaped structure, a lower ring-shaped structure, and an accommodating chamber; the upper ring-shaped structure and the lower ring-shaped structure are discontinuously arranged; the accommodating chamber is disposed in a middle part of the inner ring between the upper ring-shaped structure and the lower ring-shaped structure; an oil storing cotton is disposed inside the accommodating chamber; and the outer ring and the inner ring are made of nano-materials.
 3. The fan of claim 1, wherein the nano-bearing is made of a nano-ceramic material, a nano-silicon carbide material, a nano-zirconia material, or a nano-silicon nitride.
 4. The fan of claim 2, wherein the nano-bearing is made of a nano-ceramic material, a nano-silicon carbide material, a nano-zirconia material, or a nano-silicon nitride.
 5. The fan of claim 1, wherein nano-wear resistant layers are attached to an inner wall of the outer ring and/or an outer wall of the inner ring.
 6. The fan of claim 2, wherein nano-wear resistant layers are attached to an inner wall of the outer ring and/or an outer wall of the inner ring.
 7. The fan of claim 5, wherein the nano-wear resistant layers are nano-ceramic coating layers.
 8. The fan of claim 6, wherein the nano-wear resistant layers are nano-ceramic coating layers.
 9. The fan of claim 1, wherein one end of the rotational shaft of the motor is provided with a fixing clasp.
 10. The fan of claim 2, wherein one end of the rotational shaft of the motor is provided with a fixing clasp.
 11. The fan of claim 1, wherein an oil leak-proof ring is disposed above the nano-bearing; and a sealant is disposed in the oil leak-proof ring.
 12. The fan of claim 2, wherein an oil leak-proof ring is disposed above the nano-bearing; and a sealant is disposed in the oil leak-proof ring.
 13. The fan of claim 1, wherein an oil leak-proof lid is disposed at an opening of the outer ring at a lower part of the nano-bearing.
 14. The fan of claim 2, wherein an oil leak-proof lid is disposed at an opening of the outer ring at a lower part of the nano-bearing. 